package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA
 * Description
 * User：chenshu
 * Date：2023-10-22
 * Time：11:55
 */
public class DelOperation implements IOperation{
    public void work(BookList bookList) {
        System.out.println("删除图书！");

        System.out.println("请输入书名：");
        Scanner scan = new Scanner(System.in);
        String name = scan.nextLine();

        int currentSize = bookList.getUsedSize();
        int index = 0;
        int i = 0;
        for (; i < currentSize; i++) {
            Book book = bookList.getPos(i);
            if (book.getName().equals(name)) {
                System.out.println("找到这本书了！");
                index = i;
                break;
            }
        }

        if (i == currentSize)
        {
            System.out.println("没有你要删除的图书");
            return;
        } else {
            for (int j = index; j < currentSize - 1; j++) {
                bookList.setBooks(j, bookList.getPos(j + 1));
            }
        }

        bookList.setBooks(currentSize - 1, null);
        bookList.setUsedSize(currentSize - 1);
    }
}
